Uploading to youtube:
Youtube is a site where you can upload your own videos for others to view, who can like/dislike and comment on them. To upload you go to your channel, scroll down to uploads and select upload a video.
Once you do the screen should look as it does above, you then click upload a video and select the file you wish to upload.
The screen will look like the screenshot above and the video will upload onto youtube, during this time you can decide whether to keep your video private or let it go public.
When the video had finished uploading it should look like the screenshot above.
Pinterest is a content sharing site which you can either upload your own photographs or share ones that you like.
To upload content onto pinterest go to your account and select upload pin, select the photo that you want and press upload. The photo will upload to pinterest and the box will look like the screenshot below.
Press upload and the box below will appear to show that it has been uploaded and that you can view it now.
The end pin should look like the screenshot below.